Telegraph printer



TELEGRAPH PRINTER original Filled Aug. 24, 1940 6 Sheets-Sheet 1 Lllm www Feb. 1, 1944. c. J. FITCH ETAL TELEGRAPH PRINTER 6 Sheets-Sheet 2 Original Filed Aug. 24.- 1940 FIILTILIIL... ITrII I IIIL ATTORNEY Feb. 1, 1944. C. FITCH ETAL 2,340,303

TELEGRAPH PRINTER Original Fil'ed Aug. 24, 1940 6 Sheets-Sheet 5 .ATT-ORNEY 114|.l 1, 1944. c. J. FITCH Em; 2,340,803

TELEGRAPH PRINTER Original Filed Aug. 24, 1940 6 SheVets-Sheet 4 INvENToRs l ATTORNEY.

Feb 1, 1944- c. J. FITCH ETAL.

TELEGRAPH PRINTER Original Filed Aug. 24, 1940 6 Sheets-Sheet 5 ATTORNEY.

umu

Patented Feb. 1, 1944 ciyae .0.' auch, Euaweu,

and Kurt R. Schneider,

Endicott, N. Y., assignors to International Business Machines Corporation, New

York,

N. Y.. a corporation of New York original application August 24, 1940, sei-iai No. 354,035. Divided and this application Novem herv 18, 1941, Serial No. 419,572

6 Claims.

The present invention relates to printing telegraphy and more particularly to receiving devices for printing telegraphy wherein a message is recorded by impressing characters upon a tape.

The invention embodies a typewheel, in combination with novel shift mechanism, and is a di.. vision of applicants copending application Serial l110,354,035, filed August 24, 1940.

011e of the obiects of the'present invention is to provide in combination with a telegraph receiver including a typewheel, novel means for producing shift of the typewheel. l

ala further object is to provide novel shift mechanism comprising means movable radially of a typewheel, and means for converting said radial movement into rotative movement of the typewheel in one direction or the other.

Other objects of the invention will be pointed out in the following description and claims and illustrated inthe accompanying drawings, which disclose, by way of example, the principle of the invention and the best mode, which has been contemplated, of applying that principle.

In the drawings:

Fig. 1 is a front elevation, partly in section, of an.` embodiment of the present invention.

Fig. 1a is a detail view illustrating the operation of elements of the shift control mechanism.

Fig. 2 is'a plan view of the device of'Fig. 1,

with the ribbon feeding mechanism omitted.

Fig. 3 is a partial plan view of the device of Fig. 2 illustrating, on an enlarged scale, the 'two groups of permutation rings comprising the selector mechanism.

' Fig. 4 is a sectional vie'w, on an enlarged scale, taken on the line 4-4 of Fig. 1.

Fig. 5 is a sectional view, on an enlarged scale,

Fig. 9 is a view similar to Fig. 8, at a different perspective, illustrating the opposite sides of the elements comprising the shift mechanism.

Fig. 10 is a diagrammatic view illustrating the manner of rotation of the typewheel during shift.

Fig. 11 is a view similar to Eig. 10, illustrating the typewheel in a shifted position.

Fis. 12 is a development of the printing surface of the typewbeel.

Fig. 13 is a detail view illustrating the construction of the permutation ring interlock and release mechanism.

Fig. 14 is a side elevation illustrating the construction of the ribbon feed and ribbon reversal mechanism.

Fig. 15 is a view similar to Fig. 14, with parts omitted, illustrating the gear drive of the ribbon feed mechanism.

Fig. 16 is a view similar to Fig. 15 illustrating the position of a star wheel just prior to ribbon reversal. l

Fig. 17 is a view similar to Fig. 16 illustrating the position oi the star wheelA just after reversal of the ribbon feed mechanism.

Fig. 18 is a plan view on an enlarged scale il-` lustrating the mounting of the ribbon feed and reversal mechanism.

Referring to the drawings, and more particularly to Figs. 1, 2 and 4, the printer mechanism comprises a supporting frame 20 having a vertically extending lug 20a to which is attached a plate 2| by a slotted screw 29a. Fastened to plate 2l by suitable means (not shown) is a casing including a. three-section gear box -22 housing the v gears 23, 24 and 25. Gears 23 and 24 are suspended above and in mesh with gear 25 (Fig. 2) by means of shafts 23a and 24a to which the gears 23'and 24 are, respectively, attached. Shaft 24a ,is mounted in ball bearings 24h, 24h carried by the walls of the gear box (Fig. 4). the shaft 24a carrying at one end thereof the gear 24e. Shaft 23 similarly mounted in ball bearings carried by-its section of the gear box and carries a gear 23e at one end thereof (Figs. 2 and 3).

l Gear 25 which, as is seen from Figsi?, and 4, meshes with both gears 23 and 24 is attached to the main drive shaft 25a which is mounted in ball bearings25b, 25h supported in its section of the housing, shaft 25a carryingflat one end thereof a gear 25o (Fig. 4). Fastenled to shaft 25a at the other end thereof, is a pulley 26 driven by a belt 21 which in turn is driven by a pulley 28.

fastened to the shaft 29 (Rig. 2) of motor 30.

.Gears 23 and 24 are of equal' diameter which is 23A 2) carrying o generally cylindrical eleformed in the outer periphery thereof.

ment 3| having'a helical shaped cam groove 31a In axial alignment with shaft 25a is a shaft 25A carrying the shift operating cam 33f(Flgs. l

and 4), print hammer operating cam 34 (Fig. 1) and the ribbon feed and reversal mechanism operating cam 35 (Figs. 1 and 4) Shaft 24A is supported at one end in the ball bearing 36 (Fig. 4). The other end of shaft 24A terminates in a hollowed out portion 31 into which is inserted the shaft portion 3 8b (Figs. 4 and 6) of a clutch mechanism 39. Shaft portion 33h is suppol'tQd by a rollerv bearing 40 (Fig. 4) enclosed in housing 49a (Fig. to shaft 24A by a pin 4I (Fig. 4), Clutch 391s provided with a dog lift lever 42 (Fig. 6) controlled by stop members 'acting in conjunction shaft 24A for rotation asiasos lever 42 engages the sides 'of agije'cess 431' formed crosswiseof dog member 43; this center portion being rounded to provide rolling engagement between the sides of recess 43r- `and the portion 42h, The opposite end of the lever 42 is cut diagonally to form a tooth portion 42tvprojecting beyond the circumference of member l38. A slot 38s is formed in the face of member 38, generally at right 2) and is fastened with the permutation rings of the selector mechav nism, in a manner to be described presently. By

control of the dog lift lever 42, the clutch 39 may be vstoppedin various chosen rotative positions and a tooth 43t of the clutch mechanism will thereupon be disconnected from the driving gear 24e (similar to 23c, presently. Upon release of the dog lift lever 42, as will be presently described, the tooth 43t moves into engagement with the driving gear 24o (Fig. 5) whereby the clutch 39 will be rotated until lever 42 is again engaged by a permutation ring controlled stop member thereby positioning the clutch 33 and shaft 24A in accordance with the setting of the'permutation rings which control the lever 42 of that clutch 39 pertaining to shaft 24A. Y

Clutch 39 pertaining to shaft 24A is an eight position clutch, generally of the type as fully described in the Patent No. 2,206,646 granted to Kurt R. Schneider, July 2, 1940, and comprising a cylindrical member 38 provided in this particular clutch'with a series of eight notches such as 44 (Fig. 6) formed with member 33.V 'I'he shaft portion 38h previvollsly referred to, which is integral with member 33, extends into the hollowed portion 31 (Fig. 4)

oi.' shaft 24A and is attached thereto, as described above. A pawl member 45 is pivoted at 45a and is urged by'a spring element 45h (Fig. 7) into engagement with ange member 38a to cooperate with a notch 44 and thus prevent back rotation of the clutch when stopped in any one of its eight rotative positions.

As is seen from Figs. 6 and 7, the face of member 33 adjacent to its gear 24e (similar to 23e shown) is provided with a channel 46 in which is slidably' mounted dog member 43 having the tooth 43t mentioned above. A support member 38c, integral with member 38, extends part way into channel 43 and is provided with a reduced portion 33d axially supporting a cylindrical spring member 41 located in a bored portion` 43a formed in dog member 43, the spring member 41 constantly urging the member 43 in such a direction (to the right. in Fig. 6) so as to attempt to engage tooth 43t withthe teeth of its gear 24o, similar to 23e (Fig. 6)."

D og lift lever 42, described above, extends gcrosswise of dog member 43 and has a generally v ball-shaped end 42a (Fig. 6)

33r formed in the face-of block 38 fitted into a socket adjacent channels). A' center portion azb'of Fig. 6), all as described in a flange member 38a integral angles to channel 46 to permit oscillation of lever 4 2, with respect to 38, about the ball and socket members 42aand 38T, respectively, when 42t is engaged by a stop as described later. This oscillatory movement is transferred to the dog member 43 to produce longitudinal movement thereof, against the force of spring 41 to compress the same.

The tooth shaped end 42t is held in the position as illustrated in Fig. 5, against the force of spring 41 (Fig. 7) and upon release of its tooth shaped end, lever 42 will permit dog 43 to be vmoved by' spring 41 so as to engage tooth 43t and gear 24e, as described presently.

. direction as indicated by the dash arrows in Fig.

5. Upon engagement of end 42t and a. stop member controlled by the elements of the permutation unit, as described presently, the lever will be relatively moved, with respect to 38, about its ball and socket connection to the position as shownjin Fig.s 5, thereby disconnecting tooth 43t and gear 24e.

Back rotation of element 38 is prevented by engagement of pawl 45 with one of the eight notches 44 formed in the flange 38a of this particular clutch, thereby stopping the clutch at one of eight predetermined positions when the clutch is controlled in the novel manner as presently described. l

Shaft 23A is supported at one end by a ball bearing similar to bearing 36 of shaft 24A and contained in housing 48 (Fig. 2). The other end of shaft 23A terminates in a hollowed out portion, similar to portion '31 of shaft 24A, into which is inserted a shaft portion.38b of a clutch 39, similar to that provided for shaft 24A with the exception that the flange member 38a of this clutch is provided (Figs. 5 and 7) with four notches 44 only, to prevent back rotation of this clutch member from any.one of the four stop positions. y

Shaft 25A is similarly supported at one end by a ball bearing 38 (Fig. 4) and is provided with a hollowed out portion similar to portion 31 of shaft 24A, into which projects a shaft portion 38h of a clutch 39 associated therewith, and similar to clutch 39 of shaft 24A, with the exception that only one notch 44 is provided in its flange member 38a to prevent back rotation at one stop position only of, shaft 25A, as described presently.

Typewheel positioning .element and zone positioning of the'typewheel element, which zone positioningl comprises the shift function. These three operations will now be described inde a,s4o,soe

the notches on the respective rings being so posi- Rotatize positioning of the typewheel tioned relatively to each other that a plurality of three notches, and three' only, one only on each of the respective rings, will be aligned for each of the eight permutation positions of the three rings and such alignment occurs directly beneath one of the resiliently operated stops 6l. The toothed portion 61a of the particular stop selected, will enter the three respective aligned notches 51n, 5811. and 591i in the three rings, under magnets and is operated upon energization of any one of these magnets, to produce tape feed,

ribbon feed, printing and zone positioning, all as described presently. It is deemed obvious that magnet 55 may be independently connected for operation by a separate code signal component such as the stop component, if sequential code signal components are utilized.

Referring to Figs. 3, 4 and 5, means entering into a novel combination with the respective clutches 35 are disclosed therein. Tha-t particular clutch 39 which controls the rotative positioning of shaft 23A and therefore the rotative positioning of the typewheel 50 is shown as surrounded by a plurality of three permutation selector rings 51, 58 and 59, respectively, contained within the casing 60, mounted on the side of gear box 22. These rings are maintained in position surrounding the clutch 39, by means of casing 50 and eight clutch stops 6I, as shown. Each of the stops 6l is formed as a yoke having a toothed portion Sla at one end thereof bearing against the outer periphery of the three ringsv and another portion lb comprising a laterally extending stop cooperating withthe toothed end 4'2t of lever 42 when the particular stop is selected and permitted to operate by means of the different settings of the permutation rings. The eight stops are uniformly, circumferentially distributed about the rings, as disclosed in Fig. 5. Each of these stops is mounted for vradial movement and is constantly urged towards the center ofthe rings and against the outer peripheries of the rings, by means of individual springs 63. Each of the -three permutation rings is held against `bodily lateral movement between the solid end of casing 50 and the mid-portion of the stops 6l,

'the rings riding on support 62 (Fig. 4). Each of the rings 51, 58 and 59 may be rotated by means of an arm t4 (Fig. 5) extending outwardly from casing Bil and connected to an individual tension spring 55 which constantly holds the corresponding ring in one of. two rotary positions. Each of the arms B4 is connected by a link 66 to one end of a lever 61 which is pivoted at its other end 68 to a point 69 and connected nearits mid-point to a movable core 10 controlled by the correl sponding magnet; the rings 51, 58 and 59 being fthus connected to the magnets 53, 52 and 5|, re-

spectively. Upon energization of any one of the magnets 5l, 52 or 53, the corresponding ring will be rotated against the pull ofits associated ring f6.5 and will assume its second rotary position.

Asishown (Fig. 4), there are three permutation rings encircling that clutch 39 which controls the shaft 24A and since each ring may be oper- ,l ated to any one of two positions, a total of eight `perrnutatio`n positions may be obtained. Each of the three rings is provided with a series of eight notches, eachA one respectively of the series .stopped in one position by engagement between a stop element 5| and its lever 42; upon reception of a different signal permutation which energizes at least one of the magnets 5l, 52 or 53, one of the rings 51, 58 or 59 will be rotated to its second rotative position and the previously rotated rings will be reset to the first rotative position by means of their respective springs 65. Upon rotation of any one ring to its second position, a different set of notches on the respective rings will' be aligned and another stop member will be newly set, and the previously set stop member 8l will be cammed out of its associated group of notches so that the lever l2 will be released from the previously set stop member thereby permitting the dog 43 to move its tooth d3t into engagement with gear 24e. The clutch 51, 58 and 59. Upon this engagement of tooth 821: and the chosen stop member 6l, the\dog member 43 is voperated against the force of spring 91, its

tooth fi3t is disengaged from the gear 24o and the clutch is thereupon stopped in its new position. One of the eight notches Mlformed in the flange 38a of this clutch, will be engaged by its pawl 45 under the urge of spring 45h toth'ereby prevent back rotation of clutch 39.L By this rotationof clutch 39, shaft 24A and typewheel member 50 will be rotatively positioned in accordance with the particular relative setting of the permutation rings 51, 58 and 59, or in other Words, in

accordance with the particular permutation of three of the code signal elements received. In

this manner, any one -of eight circumferential positions of the typewheel can be selected. As is seen from the development of the typewheel 50 (Fig. 12), there are sixteen rotative or circum-` fe'rential positions. Since only eight, equally spaced circumferential positions are chosen by the three permutation ring elements 51, 58 and 59, additional means must be provided for selecting the intermediate zone positions between each of the chosen eight rotative positions. As is seen from Fig. 12, the circumferential positions in each ring of characters are divided alternately into figures and letters characters, so that selection of the respective zone positions corresponds to a shift of the typewheel. The manner and mechof the respective notches, being designated as E1n, 58u and 1591i, which notches are formed in anism for zone positioning or shifting of the typewheel will be described presently.

Arial positioning of the typewheel i1, I8 and t9, described above, control the axial positioning of the typewheel. Magnets Il and Il control, respectively, the rotative positions of the' permutation rings 1| and 12 in the same manner and one of the four stop 'members 6i (Fig. 5),

distributedas illustrated in Fig. 5, will A be aligned with a set of two notches1ln, 121i in the respective rings 1I and 12, in each of the four permuta.-

tion positions of rings 1| and;12, so that the particular clutch 39 controlledlby.V rings 1I and 12 and controlling the rotation of shaft 23A will be stopped in any one of lfour different rotative rings pertaining to the magnets which are energized are permitted to remain in or to be moved to the second position whereupon the pawl teeth 13a and 1lb will drop into position to lock the positions, in the same manner as described in detail with respect to shaftv 24A which can be stopped in any one of itseight rotative positions. A plurality of four-'notches M (Fig. 7) cooperates with a pawl l! to prevent back rotation in anyone of these four positions.

Itis to' be particularly noted, that those ones of ,the magnets vIl v to 55, inclusive, which are energized in accordance with a particular received code permutation of signal elements, do

vnot remain energized until reception of the next character signal but these selected magnets are only momentarily energized. Consequently, the permutation selector rings must be'locked in position after the momentary energization of. the

selected magnets, Iin order to prevent the springs from returning' the rings to their initial positions. The locking means must also be releasable in order to set the ringsinaccordance with a sequentially received code signal. Novel means are therefore provided for interlocking the permutation rings pertaining to the different shafts and for releasing the-selectively set rings when the succeeding code signals differ.

Referring to Figs, 3, 5 and 13, an interlocking pawl 1Iis pivoted at 13p and isJurged in a clockwise direction by lever 1l pivoted at 14p and biased-.into engagement with pawl 13 by lmeans of a spring 13s. -Pawl 13 is generally B-shaped and has a tooth 13a at one end whichbears on the peripheries of rings l1, Il and l! and has a tooth 13b at the other end which bears on the peripheries of rings 1I and 12. Each of the ilve permutation rings-has two special notches 1Inl, 131:2, formed in its outer periphery, in addition to the regular notches previously described, one of these special notches, 13M, for example, cooperating with a pawl tooth in the initial or first position of the permutationring and the other, 1ln2, co'- operating with a pawl tooth in the new or second position of the ring. The arrows in Fig. 13, indi'- cate the direction in which the respective members of the two groups of rings are rotated upon energization of the corresponding magnet; for example, ring l1 is shown in its initial or ilrst position and will be pulled clockwise to its second position. while ring l. has already beenv pulled touts .second position. notches uni and un: are separated by a tooth element tiwhich does not extend to the outer circumference of the ring so that when any one of the nve rings is rotated from its ilrst to its second position, the interlocking pawl 13 will be cammed counterclockwise to clear the teeth 13`t to unlock the rings and to thereby permit those rings who magnets are not energized, to return to the first position under the control of the respective springs Ii and those now be described in detail.'

rings in their newly assumed positions.

With a 5unit code, the following situation may arise. A character signal received, may require the positioning of rings 58 and 1l for example in their second positions and rings 51, 59 and 12 in their first positions while a sequentially received character signal may call for ring 1l in its second position and all of the other rings in their rst positions. Under the assumed conditions, none of the rings is to be moved from its llrst toits second position by the sequentially received signal. In order to insure release of the rings under the conditions assumed, the rings are -so mounted and operated as to overrun their finally assumed second position, when operated by the respective magnets. Thus, in the example chosen, although ring 1| is already in its second position, it will, upon reception of the sequential signal, be oscillated past this finally assumed second position a slight amount and tooth 13b of the pawl will be cammed counterclockwise (Fig. 13)

. and since the teeth llt do not extend to the outer periphery tooth 13a will no longer hold ring I8 which returns to its initial position under the control of itsA spring 65 so that all of the rings except ring 1| will assume their original positions.

It isseen therefore, that upon oscillation of any one of the rings 51, "or 58, that the previously selected stop Il will be cammed out of its cooperating notches to`release lever 42 ofthe corresponding clutch and will allow the clutch to interconnect shafts 24a and 24A for simultaneous rotation until lever 42 is again halted by the newly aelected stop. Similarly, oscillation of any oneof the rings Hor, 12 will allow shafts 23a andi-21A to beconnected for rotation to a new position. As is seen in Fig. 2, the rotative positionipgof the shaft 23A under control o f its four p on clutchrotates the cam member 3| to nffzhe of four different rotative positions. Upon )auch rotation, cam slot 31a will be rotated so thatgthe ment axially of shaft 23A.

A forked lever 15 (Fig. 2) pivoted at 15p,- -hasa I ball-shaped member 15a at one end of the single armthereof which bali rides in cam groovela to thereby rotate the lever 15 in a horizontal plane about pivot 15p upon rotation of shaft 23A. The forked ends 1lb and 15e (Fig. 4) of lever 15 are provided with rollers 151' which engage the sides of a circumferentially extending groove 1I (Fig. 2) formed in a cylindrical member 11 comprising an element of the composite vtypewheel I2. Upon rotation of shaft 23A to assume any one of 'its four rotative positions-under the control of the permutation rings 1| and 12, the cam slot lia will move the ball-shaped member 15a, to four d iiferent positions axially of shaft 23A, to thereby oscillate lever 1l about pivot 15p to move the arms 1lb and 15e laterally whereby the member 11 and typewheel element I0 are moved axially of shaft 24A to four diiferent positions. -The construction of the composite typewheel proper Il will Referring to Figs 2, 4, s, 9, 1o and 11, the novel A composite typewheel is shown as comprising the cylindrical membery 11, mentioned above, the typewheel element proper A El, previously described. typewheel zone selection operating member 1l and sleeve member 19, 'all mounted on to produce giove,-

I cally shaft 24A. Sleeve member 'i9 comprises ahollowed cylindrical portion 19a provided with a nange 19h at one end thereof, having a pair of diametrically aligned slots 19o extending radially same time be free to move radially thereof under the control of zone selecting mechanism to be described later. One face of member 'i8 (Fig. 9) is provided with a pair of diametrically opposed projecting lugs 18h, 18h which nt into and slide against the sides of slots itc when member 'it is mounted in position on member lil, as illustrated in Figs. 2 and 4i. The opposite face of member 18 is provided with a pair of diametrically opposed cylindrical lugs 78o, 78o (Fig. 8) which project respectively into each of the eccentric slots 5ta (Fig. 9) the typewheel element 5@ whereby the typewheel is rotated upon operation ofmember 78, as de.

scribed presently. A pair of holes ldd, '28d are formed in one side member of member 'i8 which holes coact with a ball member 5% (Fig. 9) in an opening 50c formed in typewheel element 5t, said ball member being urged toward the holes 38d by means of a helical spring member 50s, to maintain the member 'it in either one of the positions to which it is operated,.it being noted that the holes 18d are oi smaller diameter than ball 58h, so that only a portion of the ball enters one of 'the openings ldd, and upon movement of member iii, radially of member 79a, as described presently, the ball 5th is disengaged from one hole '38d and subsequently engaged with the other. The typewheel 5t, as previously described, has a plurality of letters and gures formed in the outer periphery thereof, the sixteen axially extending rows comprising alternately figures are cut through the wall dially,

. 5 of the typewheel produced by the shift function.

A rectangular pin 8B (Fig. 4)', is inserted into one of the slots 'Ha-of member il and passes throirgh the rectangular apertures 19d of member it 'and through a rectangular slot 24S cut axially of shaft 24A (Fig. 4) for movement axially therein and into the other slot 'lla of member il, to connect the members ll and 'i9 to shaft Erm for rotation therewith and to permit movement axially thereof. Typewheel 5D is locked to member T by means of spring 'Ils (Fig. 4) and ball llc, for rotation therewith upon rotation thereof and moves axially of shaft 26A upon axial movement of members 'Il and 19. Member 'it is held bez tween flange 1917 on one side and typewheel E@ on the other, but in one axial position of the typewheel assembly, the member l@ is moved ra-s presently. to

by means to be described thereby rotate the typewheel one sixteenth ci a revolution to produce shift of the typewheel e e= ment.

formed in the face of Zone positioning or shift Novel means are now provided for producing zone positioning or shift of the typewheel. As described above, in one axial 'position of the typewheel element, zone positioning, operating member i8 is so located as to be operated ra dially, to thereby shift the typewheel elent one sixteenth of a revolution, which comprises the shift of the typewheel from letters L to figures or vice versa, since, as is seen in Fig. i2,

i at its other. end to a support piece sil. Lever and letters, as illustrated in development inFig.

ment to any one of the eight rotary positions produced by rotation of shaft 2SA, as previously described, either a row of figures or a row of letters is selected and shift is produced by operation of member it to rotate the typewheel one sixteenth of a revolution, as described presently. A pair of rounded notches btp, 5911, are provided on the inner periphery of the typewheel element 5t which coact with a spring urged ball element i'ic (Figs. 4 and 8) to stop the typewheel Aelement in either one of two alternate positions. The typewheel 5@ is provided with 'an axial bore 5ta so that this element can be mounted on the cylindrical member lila, as disclosed in Fig. d.

Member il is provided with a pair of diametriopposed slots lla. extending radially from the outer periphery thereof to the innervbore Wb, into which is inserted the cylindrical portion 12, so that, upon rotation of the typewheel eles position (Fig. 4),

the axially extending rows of characters are alea temately letters and iigures.

Shaft 25A is provided with the operating cam member 33 adjacent one endl thereof (Fig. e) which rotates in the same plane as lever di (Fig. 1) having an elongated aperture da formed in one end thereof into which projects a pin 32 connected to the frame 2D. A spring @is is attached at one end to the lever t iA adjacent the lower' endy of the elongated aperture da and is connected si is positioned so as to abut the button M, (Fig. 4i) spring pressed by helical spring te against 'one face of the lever Bi. By means of'the pivot suspension of lever 8l composed of the pin d2 extending into the elongated slot 80a, and by means of the resilient support provided by spring bis and the spring pressed button 8d, the lever di is protected against deformation. Iffor any rea son, the timing between the cam 33 and the typewheel is not correct and lever di is raised before the typewheel assumes'its extreme right hand the resilient support of' the lever Bi will prevent breakage or injury to the lever or typewheel.

Upon reception of the code signal indicative of shift, the typewheel will be moved to its exe-z treme right hand position, as viewed in Fig. d, with the member 'i3 extended on center from shaft 213A, downwardly, an amount dependent upon the eccentricity of opening d8a (Fig. 8) and with member 'it in alignment with lever di.. its shaft 25A rotates, cam 33 rides across the bottom of lever 8i and raises the free end @if (Fig. la) of this lever into engagement with zone selection,

helical spring ls into engagement with one cr the other Yof the openings 5G11, (Fig. 8) of the typewheel 5t, depending upon the zone position operating member 'F3 and due to the coaction of lugs 'ith and slots i90 moves the member le rade ally of the shaft MA. Upon such radial movement, the cylindrical lugs idc (Fig. 8) riding the eccentric slots 50d (Fig. 9) will, rotate the typewheel one sixteenth of a revolution to thereby shift from letters to figures or vice versa.

As svseen from Figs. 10 and il upward motie operation means of a spring |003,

of member 18, as viewed in Fig. 4, will move lugs 18e in slots 50a to rotate the typewheel 50. With member 18 in one downwardlyextending position, the lugs 18e will be moved from the position as shown in Fig. 10 to the position as shown in Fig. 1l and the typewheel will be rotatedone sixteenth of a revolution in one direction. Upon 180 rotation of shaft 24A, the opposite operating end of member 18 (Fig. la) will now be projecting downwardly ment of member 18 by lever 8| the typewheel 50 will be rotated one sixteenth of a revolution in the opposite direction. It is to be particularly noted, that the letters shift and figures shift positions of shaft 24A are 180 apart so that .upon reception of a letters shift signal, the typewheel is rotated from figures to letters in one direction the figures shift signal, lthe typewheel is rotated from letters to figures and upon reception of in the opposite direction.

Tape feed and printing A roll of tape 86 (Fig. 4) is mounted within the tape roll support 81 attached by a bolt 01a to the arm 88 (Figs. 1 20. Tape 8 6 unwinds from its roll and passes under and over a plurality of guide rollers 89 and finally underneath the typewheel 50 and between the feed rollers so that upon. rotation of the feed rollers, as described presently, the tape 86 is fed past the typewheel element 50, and the characters of the typewheeL, which are selected by the permutation selector mechanism, will be typed upon tape 88 by means of the printing mechanism to be presently described.

The feedrollers each comprise a pair of sepa.- rate rollers 90a and 90b and 9|a and 9|b, respectively. Rollers 90a and 90b are rotatively mounted on stationary studs 92. Rollers 90a and 90b are each provided with a gear 93 (Figs. l and 2) integral therewith, and respectively, fastened to is rotatably carried by a lever 95 (Fig. 1) pivoted at 91 to the frame 20. 'Ihe lever 99 is biased upwardly (Fig.l l) by a spring 98 so that rollers 9I`a and 9|b are constantly urged towards the rollers 90a and 90b with the tape 85 between the respective pairs of rollers, as is seen in Fig. 1. Mounted on the shaft 95 for rotation thereof is the ratchet wheel 99 located between the rollers 9|a and 9|b (Figs. 1 and 2). A paw1 |00 pivotally mounted at on lever ratchet 99, and upon depression of lever |02, as described presently, pawl |00, which is constantly urged into engagement with ratchet Wheel 99 by will slideover a tooth on the wheel 99 and engage the next lower tooth of the ratchet wheel so that upon release of the lever |02, pawl |00 will rotate the ratchet wheel 99 an iamount proportional to the advancement of one tooth, to in tur rotate the shaft 95 and gears 94 meshing with gears 93 integral with therollers 90a and 90b. Since rollers 9|a and 9|b are vintegral with the shaft 95, the rollers 80a, 90b, and the rollers 9|a and 9|b are rotated simultaneously to advance the tape 00 past the typewheel 50.

Lever |02 as shown in Fig. 1, is mounted at one end on pivot |03 passing through frame 20. The other end of lever |02is constantly urged upwardly by a spring element |04.

Lever |02 passes throughia slotted opening |05 formed in the print hammerhousing |00, fastened to frame 20 `in any desired manner. A verthe .shaft 95. Shaft'95 j tically reciprocable hammer member |01 is and upon upward moveand 2) carried by the frame |02 engages a tooth of meshing with gears 94, Y'

f of lever |4 to thereby ments received.

mounted within the print hammer housing |06 (Fig. 1) and is constantly urged upwardly by means of a spring |00 pressing against the piston portion |01a of the hammer |01. A slot v|||1b is formed in the hammer member |01^in alignment 'th slot |05 and the lever |02 passes through the slot |01b so that upon downward oscillation of lever |02, it will depress the hammer |01 against the force of spring |00.

A trigger latch |09, pivotally mounted at |09a is constantly urged counterclockwise by spring l'09s. As the printing hammer |01 is depressed by lever 02, latch |09 .will engage a notch |0111 in the printing hammer |01 to hold the hammer in cocked position until the trigger latch |09 is subsequently released. Mounted on shaft 25A are the several cams 33, 34 and 35 previously mentioned, Acooperating respectively with the levers 0|, |02 and 0, cam 34 also cooperating with a cam follower |09b of the trigger latch |09, as described presently. The lever H0 is pivoted at for oscillation in a vertical plane and is pivotally connected to the link ||2 for feedingthe type ribbon H3, as will be described presently. As previously described, of that clutch 39 which controls [the shaft 25A, is provided with a single notch 44 (Fig. 5) to pre-y vent back rotation of the clutch upon stoppage of this clutch in its single position. 'I'he tooth shaped end 42t of the dog lift lever particular clutch 39 (Fig. 5) is engaged and held` in the position as shown in Fig. 5 to maintain the clutch 39 disengaged by means of a stop lever ||4 pivoted at ||5 and connected to link IIS pivotally connected at ||1 to one arm ||8 of a bellcrank ||9 pivotally mounted at |20. Armature 56a of the magnet 5l which isconnected in the return line of the magnets 5| to 55, inclusive, as previously described, forms the other arm of the bell-crank ||9 (Fig. 5) soethat upon energization of any magnet, the magnet 50 is energized to attract its armature 50a whereupon the bellcrank |f|9 is o scillated clockwise about pivot |20 to raise the link ||6 and lower the free end ||4a release the dog lift lever 42; so that tooth 43t engages the gear 25e and clutch 39 is rotated one complete revolution, prior to which time, the magnet 59 isdeenergized and the spring ||4s, acting through the lever ||4, link IIB and bell-crank H9, restores the .armature 56a to the position as shown in Fig. 5.

It is seen, therefore, that shaft 25A is rotated once for each code permutation of signal ele- Upon rotation of shaft 25A, cam depress the lever |02 to lower the plunger |91 until the trigger latch |09 continuously urged counterclockwise by spring |09s engages -the notch |0111., to hold the plunger in the cocked position, as described above. As shaft 25A continues to rotate, the cam 34 will engage the cam follower |09b to release the trigger latch |09 and the spring |00 will quickly force the plunger |01 upwardly to force the tape 86 and ribbon m into operative relation with the tpewheel character selected by the permutation selector mechanism to thereby print the selected character on the tape 95.

Ribbon feed and'reversal 34 (Fig. 1) will the aange member no,

42 of this' to pawl |23 at the other.

` the spool l|I|l once for each revolution of shaft `A and raises lever IIB and the attached link H2.

Referring to Figs. 1 and 4 and to Figs. 14 to 18, inclusive, link. ||2 is pivotally connected at one end by pivot I2| to lever il@ and atvits other end by pivot ,|22 to one arm |25 of a bell-crank element |25 mounted for rotation about shaft |25 journaled in plates |25 and |21, mounted on the frame- 2d. A. pawl |25 pivoted at |29 to the bell-crank-element I2@ is biased against a ratchet wheel by a spring Hts (Fig. 14) attached to the arm |2l|a of bell-crank |25 at one end, and As link ||2 is raised by the action of cam on lever |||l, the pawl |28 will be moved back one tooth on the ratchet wheel |55 attached to shaft |25,` for rotation thereof. As the cam 35 releases the lever Hi, spring lls will pull downwardly on lever IIS and link H2 so that pawl ,|28 will advance the ratchet wheel |3|3 an amount proportional to one tooth movement. A locking pawl |3| pivoted at |32 onplate |26 (Figs. 4 and 14) is held in engagement with ratchetfwheel |3|l by a spring it! is, so that back rotation of ratchet wheel I3@ is prevented. As the ratchet wheel 3@ advances counterclockwise, it rotates the shaft |25 counterclockwise to thereby rotate gear |33 (Fig. 15) in the same direction. Gear |35 meshes with five small pinion gears I3@ each loosely mounted on a stud |35, which studs join together the star wheels |360, and ISBD loosely mounted on shaft |25. As gear |35 is rotated counterclockwise, step by step, the pinions i3d will be rotated clockwise about their respective studs. A lever |51 pivoted at |55 on plate |25 carries a roller Hi@ intermediate its endaengaging the cuter periphery of star wheel |3511 (Fig. 18). The other end of lever |51 is constantly urged clockwise by a. spring |313 connected to lever |3`| at one end and to plate |25 at the other so that the roller |35 is constantly held against the outer periphery of the star wheel ISEa.

As illustrated in Figs. 14 and 15, one of the gears |35 is in meshing engagement with a gear |65 mounted for rotation on shaft |l| journaled in plates |26 and |21. Shaft extends through the plate |25 (Fig. 18) and carries at its end a spool |52 on which may be wound the ribbon |35. A friction washer id21 is provided between l2 and plate |25 to prevent shaft mi from turning too freely. A similar spool |65 is mounted on a shaft IM journaled in plates |25 and |21 and attached to this shaft is a gear |55 equal in diameter to the gear idd. A. friction washer |5311) similar to washer |8220 is also provided.

As gear M@ and spool M2 are rotated counterclockwise as viewed in Fig. le, or clockwise as viewed in Fig. l, the spool |432 winds'up the ribbon ||3 andunwinds it from spool |53. When the ribbon is entirely unwound from spool |68, since the end ofthe ribbon is fastened to spool M3, spool |152 and gear |55 are held against further rotation endeavored to be produced by means of pinion v|a'i|.",l?iriion |311, therefore (Figi. l5),` walks ybodily around gear Utd, so that the star wheels are rotated counterclockwise despite the force exerted by spring |35s operating through the lever |31 and roller |39. As is seen by comparison of Figs. 15 and 16, the star wheels are rotated counterclockwise, since the spring |39s is no longer strongenough to prevent rotation of the star wheels, and roller |39 thereupon rides up to the peak of a tooth |39a of the star wheel l35a,direct1y behind |361), a shown in Fig. 16, and as the pinion |34 continues to walkaround gear |40, the star wheels are rotated until roller |39 passes the peak or high point of a tooth I Sga and due to the generally toggle arrangement the 'j star wheels are thereupon snapped counterclockwise to bring a different pinion |35 into engagement with gear M5, while the previously engaged pinion |35 is disconnected from the gear Mii?, as

is seen in Fig. 17. As gear |33 is rotatedstep by step, counterclockwise, by elevation and depression of link H2, pinion |34 in engagement with gear |65 rotates the gear |55 counterclckwise as viewed in Fig. 14 or clockwise as viewed in Fig. 1, whereby the ribbon is now wound around f spool N3 and unwound from spool |52.

Similarly, as should snarl or catch or shouldn any manner y exert a force so as to prevent rotation of the spool upon which the ribbon is being wound, an automatic reversal of the ribbon feed will ensue.

Due to the two simultaneous rotations of the pinions |35, thatr is, clockwise rotation of these pinions about their studs and counterclockwise' or bodily rotation thereof about shaft |25, there will be no jamming of the gears during shifting of the gear frame when one of the pinions |36 is coming into mesh (Figs. 15 and 16) 'with the previously disengaged one of the two gears Id@ and |635. Since there is always a. positive connection between the driving means and at least one of the ribbon spools during ribbon, feed reversal, it is impossible for the gear frame to be halted at the dead'center of the toggle arrangement while characters are being printed.

Novel ribbon reversal means are therefore provided which automatically and expeditiously produce ribbon reversal whenever such a reversal is necessary.

While the operations of the various elements of the complete mechanism have been given in connection with the respective individual descriptions, a brief description of the operation of all elements of the device will now .be presented in order to clarify the novel coaction of the relative parts in producing a. unitary result, namely, printing of characters on a tape in response to code signal permutations received, each permutgtion being representaive of a character to be printed ora function to be performed.

Upon reception of the five signal elements comprising a code permutation,r certain o the magnets 5|, 52, 53, 5d and 55 (Fig. 2) will .be energized. Upon energization of any one of the magnets 5|, 52 or 55, the permutation rings 5l, 553 and 55 (Fig. 5) will be relatively rotated to align certain of the notches 5in, 58W. and 591i so that a chosen stop element 5| willbe vpermitted to enter the aligned notches. As the rings are operated to permit the chosen stop element to enter these aligned notches, the previously selected stop element is cammed out of its notches by the rotation of any one of the rings and the associated clutch 39 will thereupon engage and will rotate until the chosen stop element engages the toothed end @2t of the clutch dog lift lever 52. Shaft 24A is thereupon rotated to a position dependent upon the particular permutation of signal elements contro the magnets 5 5t and 53.

described above, ify the ribbon hand position advance the ratchet wheel lla and llb, and` rollers 90a and 90bto thereby Similarly, magnets I4 and 55 are-energized selectively, by the received code signal permutation and permutation rings 1| and 12 (Fig. 5) will be relatively rotatively positioned, to permit entry of aY-stop element will be thereupon rotated until the newly selected stop is engaged by dog lift lever 42 and shaft 23A will be rotatively positioned in accordance with the particular permutation elements controlling solenoids I4 and 55.`

Rotation of shaft 23A oecillates the arm 15 (Fig. 2) to axially move the typewheel I0 to one of four axial into the Lnewly aligned notches 1|n and 1211. The associated clutch 39 'of code signal the` ribbon is completely thc return circuit cf any the magnets u tc ts,-

inclusive, will be energized. The particular clutch 30 controlled by magnet l0 has only one rotative. stop position, so that .shaft 2BA is rotated one complete revolution and one revolution only, for each code signal permutation received.

As shaft A rotates its one full revolution the cams 33 (Figs. 1 and 4), 34 (Fig. 1) and I5 (Figs. land 4) will be rotated. Since shafts 23A and 24A are rotated at 1200 P. M. while the shaft 20A is rotated. only at 900 R. P. M., regardless of which stop elementsare selected, the shafts 23A and 24A will be-halted by the time shaft 25A has completed three quar-f ters of a revolution.

If the code signal received is representative of ction, the typewheel element 50 will the right of the position as illus- 4 until it assumes its extreme right under controlof the rotating shaft 23A, ca m slot Sia and oscillating lever 15 (Fig. 2). In the extreme righty hand position, the shaft 24A will be rotatiyely positioned in either one of two positionsA separated by 180, dependent upon whether the figures shift functionor the letters shlft'function is desired. In this extreme right the shift fun be moved to trated in Fig.

hand 'position of the typewheel I0, theradially. 'slidable element 1I (Figs. oil-center downwardly (Fig.4) and as cam 33 ro- 8 and 9) will project tates, the element 1l is radially actuated by lever 4| (Fig. 1a) to produce rotation of the typewheel l0 for one sixteenth of a revolution to thereby produce shift, this function being performed dur-I ing the last quarter revolution of the shaft 20A. In this positionof the typewheel, there are no characters opposite the hammer |01 so that no character is printed upon tape 0I. When the typewheel Il is axially and circumferentially positioned so as to align a character with-the printing plunger or hammer |01. the rotation of shaft 20A will first rotate the cam 34 (Fig. 1) to depress the lever |02 about its pivot |03 to in turn depress the hammer |01 against .the force of spring |00 until the latch |09 engages notch |0111. in hammer |01 and the latch is Also while lever |02 Dressed, the pawl |00 is being deslips back one tooth on the ratchet wheel and upon release of lever |02 by the continued rotationof cam,34, spring 00 to rotate the rollers maintained in position by means of the, vvspring |093.

. slot therein,

l said lever.

' moving said typewheel,

advance the tape. As theshaft 25A continues t0 rotate. cam 34 engages the cam follower lub j to release the latch |09 and the hammer |01 will thereupon force the tape 88 'and the ribbon III against the chosen aligned character of typewheel 50 (Fig. 1) to print the selected character.

While shaft 25A is rotating, cam 35 will engage the lever H0, tp raise the link ||2 (Fig. 14) to .thereby rotate one of the spools |42 or |43 to wind up the ribbon on one spool and to unwind details of the device illustrated and in its operation may be madeI by those skilled in the art, without departing from the spirit -of the invention. It is the intention, therefore. to be limited only as indicated byI the scope of the following claims.

What is claimed is:

1..In a printing telegraph receiver, a. sh'aft, a typewheel mounted on said shaft for. rotation with respect thereto, a member mounted on said shaft for movement radially-thereof, and cooperating means on said radially movablel member and said typewheel for converting radial movement of said memberinto rotatlonlof said typewheel. 2. In a printing receiver, a typew eel, means for rotatably and axially positioning aidA typewheel, and means for producing shift of said typewheel' comprising a lever having an elongated oscillatably lever to engage one extremityof said slot with said pivot, means for rocking sail lever,l means cooperating with said lever in oneaxiai position of said typewheel to produce shift of said f and means resiliently abutting against said lever and cooperating with sa'id slot v a side of and resilient means for non-rigidly mounting ential portions thereof, a second cylindrical mem-l bei' mounted on said shaft and interiltted within 1piroducing member in its radially shifted posito a single modiflca- 4 typewheel assembly including a hollow cylindrical member mounted on said shaft for rotation -with respectl thereto, a radially slidable member mounted on said shaft, a slotted cylindrical member mounted on said shaft adjacent to said slidable member, -means on said slidable member cooperating with the slots on said cylindrical member to restrain said slidable member tive in a single predetermined axial position only of said typewheel for actuating said movable member, and coacting means on said member and said typewheel for converting radial movement of said member into rotative movement of said typewheel when the latter is in the said predetermined axial position.

6. In a printing telegraph receiver, a typewheel, means mounting said typewheel for axial and rotative movements, a slidable member continuously cooperating with the said typewheel, said member being carried by said mounting means and constrained thereby to movement radially thereof, and cooperating means on said typewheel and member for converting radial movement of said member into rotation of said typewheel.

` CLYDE J. FITCH.

KURT R. SCHNEIDER. 

